| 4901 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Nov 2025 |
| 4902 | Hannathon Petroleum II, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 4903 | Hannathon Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 4904 | Hannis Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | Feb 2026 |
| 4905 | Hansen Oil Corporation | Shreveport, LA 71106 | Oil Operator | Apr 2003 |
| 4906 | Hansford, Inc. | Amarillo, TX 79101 | Gas Operator | Dec 2004 |
| 4907 | Hanshu Production Company | Darrouzett, TX 79024 | Oil & Gas Operator | Apr 2017 |
| 4908 | Hanshu Production Company, LLC | Nashville, TN 37215 | Gas Operator | Feb 2026 |
| 4909 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 4910 | Hanson Minerals Co. | Houston, TX 77042 | Oil & Gas Operator | Oct 1993 |
| 4911 | Hanson Operating Company Inc | Roswell, NM 88202 | Oil & Gas Operator | Aug 2025 |
| 4912 | Hanson Production Company | Cuero, TX 77954 | Oil & Gas Operator | Jul 2009 |
| 4913 | Hanvey Production Co., Inc. | Roanoke, TX 76262 | Oil & Gas Operator | Nov 2012 |
| 4914 | Hanvey, Don H. Oil Interests Inc | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 4915 | Harbor Petroleum, LLC | Granbury, TX 76049 | Oil & Gas Operator | Feb 2026 |
| 4916 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2026 |
| 4917 | Harco Land, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Aug 1996 |
| 4918 | Hardey Co., The | Shreveport, LA 71107 | Oil & Gas Operator | Feb 2026 |
| 4919 | Hardin Energy Co., Inc. | Bigfoot, TX 78005 | Oil Operator | Feb 2026 |
| 4920 | Hardin, W.V. Estate | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2002 |
| 4921 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 4922 | Harding Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2016 |
| 4923 | Harding Well Service Co. | Coahoma, TX 79511 | Oil & Gas Operator | Aug 2003 |
| 4924 | Hardrock Operating Company, Inc. | Fort Worth, TX 76161 | Oil & Gas Operator | Feb 2026 |
| 4925 | Hardrock Resources Inc. | Winters, TX 79567 | Oil & Gas Operator | Feb 2026 |
| 4926 | Hardway Prod & Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Aug 2016 |
| 4927 | Hardwick Oil Company | Sugar Land, TX 77478 | Oil & Gas Operator | Nov 2014 |
| 4928 | Hardwick, Mark P. Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 1994 |
| 4929 | Hardwick, Ross H. Oil Company | Devine, TX 78016 | Oil & Gas Operator | Feb 2026 |
| 4930 | Hardy Oil & Gas USA Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1996 |
| 4931 | Hardy Ranch, Inc. | Henderson, TX 75654 | Oil & Gas Operator | Feb 2026 |
| 4932 | Hargis Exploration & Prod., Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1996 |
| 4933 | Haring Energy Company | Tuleta, TX 78162 | Oil & Gas Operator | Mar 2003 |
| 4934 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 4935 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 4936 | Harleton Oil & Gas Inc. | Tyler, TX 75710 | Oil & Gas Operator | Feb 2026 |
| 4937 | Harlow Corporation, The | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2014 |
| 4938 | Harman Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2007 |
| 4939 | Harmel And Shawver Oil LLC | Wichita Falls, TX 76310 | Oil Operator | Feb 2026 |
| 4940 | Harmon, C. E. Oil, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2019 |
| 4941 | Harmonia Petroleum Corporation | Missouri City, TX 77459 | Oil & Gas Operator | May 2017 |
| 4942 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 4943 | Harmony Exploration, Inc. | College Sta, TX 77842 | Oil & Gas Operator | Feb 2026 |
| 4944 | Harms, Vance N. | Talpa, TX 76882 | Oil & Gas Operator | Mar 2016 |
| 4945 | Harper Hefte, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Feb 2026 |
| 4946 | Harper Oil And Gas, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 4947 | Harper Production, LLC | Spearman, TX 79081 | Oil & Gas Operator | Feb 2026 |
| 4948 | Harper, Clint | Woodson, TX 76491 | Oil & Gas Operator | Feb 2026 |
| 4949 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 4950 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 4951 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 4952 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 4953 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 4954 | Harrier Holdings, LTD. | Burnet, TX 78611 | Oil Operator | Feb 2026 |
| 4955 | Harrigan Energy Partners, Inc. | Houston, TX 77058 | Oil & Gas Operator | Sep 2010 |
| 4956 | Harrigan Operating, LLC | Houston, TX 77258 | Oil & Gas Operator | Apr 2020 |
| 4957 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | Feb 2026 |
| 4958 | Harris Energy Services, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 4959 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 4960 | Harris, Jake, Trustee | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2001 |
| 4961 | Harris, Sam E. | Albany, TX 76430 | Oil & Gas Operator | Aug 2003 |
| 4962 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 4963 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 4964 | Harrison, Dan J III&Bruce F Est | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 4965 | Harrison, Dan J. III&Bruce F. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 4966 | Harrison, Sam G. Oil, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2019 |
| 4967 | Hart & McFarland | Vivian, LA 71082 | Oil & Gas Operator | Feb 2026 |
| 4968 | Hart Petroleum Services, Inc | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jul 2025 |
| 4969 | Hartel, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Aug 1997 |
| 4970 | Harter, Ron | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 4971 | Hartman, Doyle | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 4972 | Hartoil Corporation | Post, TX 79356 | Oil & Gas Operator | Feb 2026 |
| 4973 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | Feb 2026 |
| 4974 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 4975 | Harvest Operating Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 1997 |
| 4976 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Feb 2026 |
| 4977 | Harvest Petroleum Partners LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 4978 | Harvey Brothers Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Jul 2004 |
| 4979 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 4980 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 4981 | Harvey, Robert E., Jr. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2003 |
| 4982 | Harvick Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2009 |
| 4983 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 4984 | Harwell Enterprises | Loveland, CO 80537 | Gas Operator | Nov 2019 |
| 4985 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 4986 | Harwood Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 4987 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | Feb 2026 |
| 4988 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 4989 | Hat Creek Energy LLC | Denver, CO 80209 | Oil & Gas Operator | Jun 2019 |
| 4990 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 4991 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 4992 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 4993 | Havens Oil Company | Early, TX 76803 | Oil & Gas Operator | Nov 2025 |
| 4994 | Haverkamp, Floyd | Muenster, TX 76252 | Oil & Gas Operator | Oct 2001 |
| 4995 | Havins Energy | Burkburnett, TX 76354 | Oil & Gas Operator | May 2006 |
| 4996 | Hawk Exploration And Production | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Oct 1995 |
| 4997 | Hawk Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 4998 | Hawk Petroleum, L L C | San Diego, TX 78384 | Oil & Gas Operator | Feb 2026 |
| 4999 | Hawk Well Service | Borger, TX 79007 | Oil & Gas Operator | Feb 2026 |
| 5000 | Hawk-Hill Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jun 2009 |